Official Blizzard Quote:

Druid
Tranquility now targets 12 raid members (up from 5) each time it heals when used in a 25-player instance. This change also applies to players using the Symbiosis version of Tranquility.

Restoration
Ironbark now has a cooldown of 60 seconds, down from 2 minutes.
Swiftmend area-of-effect component now heals injured allies within 10 yards, up from 8 yards.
Wild Mushroom: Bloom now heals all allies within 10 yards (up from 8 yards) for 100% more, and includes bonus healing from Rejuvenation overhealing.
Item Sets
Restoration PvP 4-piece set bonus now reduces the cooldown of Ironbark by 30 seconds (down from 90 seconds).

Hunter
Revive Pet now has a cast time of 4 seconds, down from 6 seconds.

Monk

Mistweaver
Revival now has a healing cap of 15 raid members (up from 6) when used in a 25-player instance.

Paladin
Devotion Aura can now be used while the Paladin is silenced.

Glyphs
Glyph of the Battle Healer now heals a nearby injured friendly target, excluding the Paladin, for 20% of damage dealt while Seal of Insight is active, down from 30%.

Priest

Glyphs
Glyph of Smite no longer causes the additional 20% damage dealt by Smite to transfer into Atonement.

Discipline
Atonement now heals nearby friendly targets for 90% of the damage dealt, down from 100%.
Penance now deals 10% less damage, but healing done is increased by 10%.

Holy
Divine Hymn now targets 12 raid members (up from 5) each time it heals when used in a 25-player instance.

Shadow
Vampiric Embrace now has a healing cap of 15 raid members (up from 6) when used in a 25-player instance.

Warlock
Demonic Gateway cast time has been reduced to 4 seconds, down from 5 seconds, gains its first charge after 5 seconds (down from 13 seconds), and gains a new charge every 10 seconds (down from 15 seconds). The summoned gateway has 100% of the summoning Warlock's health, 100% of the Warlock's resilience, and can now be attacked and killed by enemy players.
Item Sets
Warlock PvP 2-piece set bonus no longer reduces cooldown on Unending Resolve and have been replaced by the former 4-piece set bonus where the Warlock's Twilight Ward absorbs damage from all magical schools.
Warlock PvP 4-piece set bonus now increases damage dealt by Agony, Corruption, Doom, Immolate, and Unstable Affliction by 10%.

Are you serious right now? This is actually really good for their survivability. Have you not seen how easy it is to swap to a druid with no Hots and kill him in a stun? Oh, wait that's every class lol.

Are you serious right now? This is actually really good for their survivability. Have you not seen how easy it is to swap to a druid with no Hots and kill him in a stun? Oh, wait that's every class lol.

Are you serious right now? This is actually really good for their survivability. Have you not seen how easy it is to swap to a druid with no Hots and kill him in a stun? Oh, wait that's every class lol.

Are you serious right now? This is actually really good for their survivability. Have you not seen how easy it is to swap to a druid with no Hots and kill him in a stun? Oh, wait that's every class lol.

jesus, there needs to be another rank of arena junkies posters. "members," "junkies," and "people who actually read before the post." I might as well be posting on the wow forums with all the 1300 backpedalers.

Hunters, least represented for 4 seasons. Average for one. Here comes the 5th at the bottom, and we're worse than ever.